正则表达式调试器代码

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         < title > Power Maintenance Tools -- By Alai [http://www.9499.net] </ title >  
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            高级查找/替换、正则表达式练习器、Javascript脚本程序调试器 < br >
             < textarea  id ='text1'  rows ='8'  cols ='82' ></ textarea >< br >
             < span  id ="spanFirst" > 查询表达式 </ span > ： < input  id ="txtFirst"  type ="text"  size ="60" >< br >
             < span  id ="spanSecond" > 替换为 </ span > ： < input  id ="txtSecond"  type ="text"  size ="56" >< br >
             < input  type ="button"  id ="btnExe"  value ="运行脚本程序" >
             < input  type ="button"  id ="btnSchRpl"  value ="执行查找/替换" >
             < input  type ="button"  id ="btnUndo"  value ="撤消"  disabled ="true" >
             < input  type ="button"  id ="btnRedo"  value ="重做"  disabled ="true" >
             < br ></ div >
         < script >
var aryUndo=[],aryRedo=[]
function btnExe.onclick()
{
    if(text1.value=="")return false
    aryCommand=text1.value.split("\r\n")
    var line
try{
    for(line=0;line<=aryCommand.length-1;line++)
    {
            eval(aryCommand[line]+";")    
    }
}
catch(e){
        var msg="执行脚本程序程序出错，在第"+(line+1)+"行。\n"
        msg+="错误代码："+e.number+"\n"
        msg+="错误信息："+e.description+"\n"
        alert(msg)
}
}

function btnSchRpl.onclick()
{
    if(txtFirst.value=="")
    {
       alert("请输入查询条件!")
       txtSecond.focus()
       return false
    }
     aryUndo[aryUndo.length]=text1.value
     aryRedo=[]
     btnRedo.disabled=true 
     btnUndo.disabled=false 

        var s=new RegExp(txtFirst.value,"ig")
     text1.value=text1.value.replace(s,txtSecond.value)
}
function btnUndo.onclick()
{
    aryRedo[aryRedo.length]=text1.value
    btnRedo.disabled=false
    text1.value =aryUndo[aryUndo.length-1]
    aryUndo.length--
    if(aryUndo.length==0)btnUndo.disabled=true
}
function btnRedo.onclick()
{
    aryUndo[aryUndo.length]=text1.value
    btnUndo.disabled=false
    text1.value=aryRedo[aryRedo.length-1]
    aryRedo.length--
    if(aryRedo.length==0)btnRedo.disabled=true
}
         </ script >
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