Removing The First zero from the string without changing rest of the string

function TrimStr(js_val)
{
    var js_rslt="";
    var js_flg=false;
    var ls_substr="";
        if(js_val!="")
        {
            ji_ln=js_val.length;
            for(i=0 ; i<ji_ln ; i++)
            {
                ls_substr=js_val.substring(i,i+1);
                if (isNaN(parseInt(ls_substr))==0 && js_flg==false )
                {
                   js_flg=true;
                }
                else
                {
                    js_rslt+=ls_substr;
                }
             }
         }

         alert(js_rslt);
}