去掉输入中的空格 但是字符串中的光标位置不变

<script type="text/javascript">
var len;
//去掉左边空格
function ltrim(s)
{
 return s.replace(/(^\s*)/g, '');
}

//去掉右边空格
function rtrim(s)
{
return s.replace(/(\s*$)/g, '');
}

//去掉左右空格
function trim(s){
return rtrim(ltrim(s)); 
}

function clearNoStr(obj){
     var s=document.selection.createRange();  
     s.setEndPoint("StartToStart",obj.createTextRange())
     len=trim(s.text).length;
          var report=document.getElementById(obj.id).value;
          var reportItem=trim(report);
  
          if(reportItem=='' || reportItem==null){
                document.getElementById(obj.id).value=report.substring(report.length);
                      document.getElementById(obj.id).focus();
                       return ;

          }else{
             var count=report.substring(0,report.length-reportItem.length);
             var countLength=count.length;
    var countStr="";
    //去掉左边的空格符
             for(var i=0;i<countLength;i++){
                 countStr+=" ";
             }

             if(count==countStr){
              document.getElementById(obj.id).value=report.substring(countLength);
    
             }else{
              document.getElementById(obj.id).value=report.substring(0,reportItem.length);
              }
    
         }
         clearInnerStr(obj);
}
 function clearInnerStr(obj){
        var reqStr=document.getElementById(obj.id).value;
  var size=reqStr.length;
  var noStr="";
  for(var i=0;i<size;i++){
     noStr=reqStr.charAt(i);
      if(noStr==" "){
         IgnoreSpaces(obj.id,reqStr);
   }
  }
var range = obj.createTextRange();
range.moveStart('character',len);
range.collapse(true);
range.select();
}
function getPos(obj){  
s=document.selection.createRange();  
s.setEndPoint("StartToStart",obj.createTextRange())  
len=s.text.length;
 
}
function PutCursorAtFirst(obj)
    { 　
        obj.focus();
        var range = obj.createTextRange();
        range.moveStart('character',6);
        range.collapse(true);
        range.select();
    }
function IgnoreSpaces(id,Str){
    var ResultStr = "";
    Temp=Str.split(" ");//双引号之间是一个空格
    for(i = 0; i < Temp.length; i++){
    ResultStr +=Temp[i];
    }
    document.getElementById(id).value=ResultStr;
    //document.getElementById(id).focus();
}

function setCursor(input,event) {
     //alert(String.fromCharCode(event.keyCode));
    var i=document.getElementById(input.id).value;
    var start=i.length;
    var end=i.length;
    for(var j=0;j<i.length;j++){
        //alert(i.charAt(j));
    }
    /*
    if(input.setSelectionRange) { 
          input.focus(); 
         input.setSelectionRange(start,end); 
       } 
    else {
    */ 
       if(input.createTextRange) { 
          range=input.createTextRange(); 
          range.collapse(true); 
          range.moveEnd('character',end); 
         range.moveStart('character',start); 
         range.select(); 
       } 
    /*
    }
    */
 } 

</script>
禁止在内容中输入空字符：<input type="text" id="name" value="" onkeyup="clearNoStr(this);"><p>
<input type="text" id="name2" value="" onkeyup="setCursor(this,event);">