JavaScript 通用库

/*
       名字：Common.js
       功能：通用javascript脚本函数库
       包括：
                     1.Trim(str)－－去除字符串两边的空格
                     2.XMLEncode(str)－－对字符串进行XML编码
            3.ShowLabel(str,str)－－鼠标提示功能（显示字符，提示字符）
                     4.IsEmpty(obj)－－验证输入框是否为空
                     5.IsInt(objStr,sign,zero)－－验证是否为整数
                     6.IsFloat(objStr,sign,zero)－－验证是否为浮点数
                     7.IsEnLetter(objStr,size)－－验证是否为26个字母
*/
/*
==================================================================
字符串操作
Trim(string):去除字符串两边的空格
==================================================================
*/
/*
==================================================================
LTrim(string):去除左边的空格
==================================================================
*/
function LTrim(str)
{
    var whitespace = new String(" \t\n\r");
    var s = new String(str);
    if (whitespace.indexOf(s.charAt(0)) != -1)
    {
        var j=0, i = s.length;
        while (j < i && whitespace.indexOf(s.charAt(j)) != -1)
        {
            j++;
        }
        s = s.substring(j, i);
    }
    return s;
}
/*
==================================================================
RTrim(string):去除右边的空格
==================================================================
*/
function RTrim(str)
{
    var whitespace = new String(" \t\n\r");
    var s = new String(str);

    if (whitespace.indexOf(s.charAt(s.length-1)) != -1)
    {
        var i = s.length - 1;
        while (i >= 0 && whitespace.indexOf(s.charAt(i)) != -1)
        {
            i--;
        }
        s = s.substring(0, i+1);
    }
    return s;
}

/*
==================================================================
Trim(string):去除前后空格
==================================================================
*/
function Trim(str)
{
    return RTrim(LTrim(str));
}
/*
======================================================================
XMLEncode(string):对字符串进行XML编码
======================================================================
*/
function XMLEncode(str)
{
       str=Trim(str);
       str=str.replace("&","&");
       str=str.replace("<","");
       str=str.replace("'","'");
       str=str.replace("\"",""");
       return str;
}
/*
================================================================================
验证类函数
================================================================================
*/
function IsEmpty(obj)
{
    obj=document.getElementsByName(obj).item(0);
    if(Trim(obj.value)=="")
    {
        alert("字段不能为空。");
        if(obj.disabled==false && obj.readOnly==false)
        {
            obj.focus();
        }
    }
}

/*
IsInt(string,string,int or string)测试字符串,+ or - or empty,empty or 0)
功能：判断是否为整数、正整数、负整数、正整数+0、负整数+0
*/
function IsInt(objStr,sign,zero)
{
    var reg;
    var bolzero;

    if(Trim(objStr)=="")
    {
        return false;
    }
    else
    {
        objStr=objStr.toString();
    }
    if((sign==null)||(Trim(sign)==""))
    {
        sign="+-";
    }
    if((zero==null)||(Trim(zero)==""))
    {
        bolzero=false;
    }
    else
    {
        zero=zero.toString();
        if(zero=="0")
        {
            bolzero=true;
        }
        else
        {
            alert("检查是否包含0参数，只可为(空、0)");
        }
    }
    switch(sign)
    {
        case "+-":
            //整数
            reg=/(^-?|^\+?)\d+$/;
            break;
        case "+":
            if(!bolzero)
            {
                //正整数
                reg=/^\+?[0-9]*[1-9][0-9]*$/;
            }
            else
            {
                //正整数+0
                //reg=/^\+?\d+$/;
                reg=/^\+?[0-9]*[0-9][0-9]*$/;
            }
            break;
        case "-":
            if(!bolzero)
            {
                //负整数
                reg=/^-[0-9]*[1-9][0-9]*$/;
            }
            else
            {
                //负整数+0
                //reg=/^-\d+$/;
                reg=/^-[0-9]*[0-9][0-9]*$/;
            }
            break;
        default:
            alert("检查符号参数，只可为(空、+、-)");
            return false;
            break;
    }

    var r=objStr.match(reg);
    if(r==null)
    {
        return false;
    }
    else
    {
        return true;
    }
}

/*
IsFloat(string,string,int or string)测试字符串,+ or - or empty,empty or 0)
功能：判断是否为浮点数、正浮点数、负浮点数、正浮点数+0、负浮点数+0
*/
function IsFloat(objStr,sign,zero)
{
    var reg;
    var bolzero;

    if(Trim(objStr)=="")
    {
        return false;
    }
    else
    {
        objStr=objStr.toString();
    }

    if((sign==null)||(Trim(sign)==""))
    {
        sign="+-";
    }

    if((zero==null)||(Trim(zero)==""))
    {
        bolzero=false;
    }
    else
    {
        zero=zero.toString();
        if(zero=="0")
        {
            bolzero=true;
        }
        else
        {
            alert("检查是否包含0参数，只可为(空、0)");
        }
    }

    switch(sign)
    {
        case "+-":
            //浮点数
            reg=/^((-?|\+?)\d+)(\.\d+)?$/;
            break;
        case "+":
            if(!bolzero)
            {
                //正浮点数
                 reg=/^\+?(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
            }
            else
            {
                //正浮点数+0
                reg=/^\+?\d+(\.\d+)?$/;
            }
            break;
        case "-":
            if(!bolzero)
            {
                //负浮点数
               reg=/^-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*))$/;
            }
            else
            {
                //负浮点数+0
                reg=/^((-\d+(\.\d+)?)|(0+(\.0+)?))$/;
            }
            break;
        default:
            alert("检查符号参数，只可为(空、+、-)");
            return false;
            break;
    }

    var r=objStr.match(reg);
    if(r==null)
    {
        return false;
    }
    else
    {
        return true;
    }
}

/*
IsEnLetter(string,string):测试字符串，大小写(UL,U,L or ul,u,l)
*/
function IsEnLetter(objStr,size)
{
    var reg;

    if(Trim(objStr)=="")
    {
        return false;
    }
    else
    {
        objStr=objStr.toString();
    }

    if((size==null)||(Trim(size)==""))
    {
        size="UL";
    }
    else
    {
        size=size.toUpperCase();
    }

    switch(size)
    {
        case "UL":
            //大小写
            reg=/^[A-Za-z]+$/;
            break;
        case "U":
            //大写
            reg=/^[A-Z]+$/;
            break;
        case "L":
            //小写
            reg=/^[a-z]+$/;
            break;
        default:
            alert("检查大小写参数，只可为(空、UL、U、L)");
            return false;
            break;
    }

    var r=objStr.match(reg);
    if(r==null)
    {
        return false;
    }
    else
    {
        return true;
    }
}

/*
=====================================================================
功能：鼠标小提示
作者：申旺
日期：2004/04/15
======================================================================
*/

//定义变量、设置默认值
var LabelFontFace="宋体,arial,Verdana";
var LabelFontColor="#000000";
var LabelFontSize="9pt";
var LabelFontStyle="Font.PLAIN";
var LabelBorderColor="#000000";
var LabelBackColor="#FFFFE1";

//设置各个属性
function SetLabelFontFace(obj)
{
       obj=Trim(obj);
       if(obj==null || obj=="")
       {
              obj="宋体,arial,Verdana";
       }
       LabelFontFace=obj;
}

function SetLabelFontColor(obj)
{
    obj=Trim(obj);
       if(obj==null || obj=="")
       {
              obj="#000000";
       }
       LabelFontColor=obj;
}

function SetLabelFontSize(obj)
{
    obj=Trim(obj);
       if(obj==null || obj=="")
       {
              obj="9pt";
       }
       LabelFontSize=obj;
}

function SetLabelFontStyle(obj)
{
    obj=Trim(obj);
       if(obj==null || obj=="")
       {
              obj="Font.PLAIN";
       }
       LabelFontStyle=obj;
}

function SetLabelBorderColor(obj)
{
    obj=Trim(obj);
    if(obj==null || obj=="")
    {
        obj="#000000";
    }
    LabelBorderColor=obj;
}

function SetLabelBackColor(obj)
{
    obj=Trim(obj);
    if(obj==null || obj=="")
    {
        obj="#FFFFE1";
    }
    LabelBackColor=obj;
}

//合成文字样式
function SetTextStyle(str)
{
    var strRet="";

    var strStyle="";

    strStyle="font-family:"+LabelFontFace+";";
    strStyle+="color:"+LabelFontColor+";";
    strStyle+="font-size:"+LabelFontSize+";";

    switch(LabelFontStyle.toLowerCase())
    {
        case "font.plain":
            strStyle+="font-weight: normal;";
            strStyle+="font-style: normal;";
            break;
        case "font.bold":
            strStyle+="font-weight: bold;";
            strStyle+="font-style: normal;";
            break;
        case "font.italic":
            strStyle+="font-weight: normal;";
            strStyle+="font-style: italic;";
            break;
        case "font.italicbold":
        case "font.bolditalic":
            strStyle+="font-weight: bold;";
            strStyle+="font-style: italic;";
            break;
        default:
            strStyle+="font-weight: bold;";
            strStyle+="font-style: italic;";
            break;
    }

    strRet="<font style='"+strStyle+"'>";
    strRet+=" "+str+" ";
    strRet+="</font>";

    return strRet;
}

//合成表格样式
function SetTableStyle()
{
    var strRet="";

    strRet+="border-right: "+LabelBorderColor+" 1px solid;";
    strRet+="border-top: "+LabelBorderColor+" 1px solid;";
    strRet+="border-left: "+LabelBorderColor+" 1px solid;";
    strRet+="border-bottom: "+LabelBorderColor+" 1px solid;";
    strRet+="background-color:"+LabelBackColor;

    return strRet;
}

//显示提示
function ShowNote(str)
{
       var strHtml;

       strHtml="";
       strHtml+="<table height=1px width=1px border='0'cellspacing='0' cellpadding='0' style='" + SetTableStyle() + "'>";
       strHtml+="<tr>";
       strHtml+="<td>"+SetTextStyle(str)+"</td>";
       strHtml+="</tr>";
       strHtml+="</table>";

       if (document.all&&document.readyState=="complete")
       {
              document.all.div_Note.innerHTML=strHtml;
              document.all.div_Note.style.pixelLeft=event.clientX+document.body.scrollLeft+10
              document.all.div_Note.style.pixelTop=event.clientY+document.body.scrollTop+10
              document.all.div_Note.style.visibility="visible"
       }
}

//隐藏提示
function HideNote()
{
       if (document.all)
       {
              document.all.div_Note.style.visibility="hidden";
       }
       else
       {
              if (document.layers)
              {
                     clearInterval(currentscroll)
                     document.div_Note.visibility="hidden";
              }
       }
}

//初始化
function Init()
{
    window.document.write("<div id=\"div_Note\" style=\"VISIBILITY:hidden; POSITION:absolute; HEIGHT:13px;z-index:1\"></div>");
}
Init();

//生成提示字符

function ShowLabel(text,note,bclick)
{
       if(bclick!=null)
       {
              return "<a href=\"#\" onMouseOver=\"ShowNote('" + note + "')\" onMouseOut=\"HideNote()\" onClick=\"javascriptoSomeThing(this);\">" + text + "</a>";
       }
       else
       {
           return "<a href=\"#\" onMouseOver=\"ShowNote('" + note + "')\" onMouseOut=\"HideNote()\">" + text + "</a>";
       }
}

测试页面：
<HTML>
    <HEAD>
        <title>Common javascript</title>
              <script language="javascript" src="./Common.js"></script>
        <script language="javascript">
                     function CheckInt()
                     {
                            iptResult.value=IsInt(iptTest.value,iptSign.value,iptZero.value);
                     }

                     function CheckFloat()
                     {
                            iptResult.value=IsFloat(iptTest.value,iptSign.value,iptZero.value);
                     }

                     function CheckLetter()
                     {
                            iptResult.value=IsEnLetter(iptTest.value,iptSign.value);
                     }
                     document.write(ShowLabel("TEST","Only a testing!"));
                     document.write("<br>");
              </script>
        <meta http-equiv="expires" content="0">
    </HEAD>
    <body>
     <input type=text value="" id="iptTest"><input type=button value="IsEmpty" onclick="IsEmpty('iptTest');">
     <input type=button value="CheckInt" onclick="CheckInt()">
        <br>
     <input type=text value="" id="iptSign" NAME="iptSign"><input type=button value="CheckFloat" onclick="CheckFloat()">
        <br>
     <input type=text value="" id="iptZero" NAME="iptZero"><input type=button value="CheckLetter" onclick="CheckLetter()">
     <br>
     <input type=text value="" id=iptResult disabled=true>
    </body>
</HTML>