Javascriptworking in IE not working in other browser

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Javascript

hi...........

I have written code for link button disabled which is dynamically generated in the javascript.this code works properly in IE but not in other browser.Also Some code works properly in chrome but not in IE.I have used hidden variable in which list of all button(hdnModeList) store and in another varible btn which clicked store(hdnMode).my code is given as

function PageLoad() {  
        btnList = document.getElementById('hdnModeList').value;
        EnableDisableAllCtrls(true);
        if (document.getElementById('hdnMode').value != "") {
            setMode(document.getElementById('hdnMode').value);
        }
        if (document.getElementById('hdnSuccessMessage').value == "Success") {            
            alert(document.getElementById('hdnUserSuccessMessage').value);
            Clear_Page();
            document.getElementById('hdnUserSuccessMessage').value = "";
            document.getElementById('hdnSuccessMessage').value = "";
        }
    }
// setMode - Obtains the value of clicked button to get Mode

function setMode(mode) {
   // PageMethods.EnableDisabledMenu();
    document.getElementById('hdnMode').value = mode;  
    var splitRes = document.getElementById('hdnModeList').value.split(",");    
//======== this is code where i am disabling all btn other than click one =========

     for (var i = 0; i < splitRes.length; i++) {
         if ((splitRes[i] != "") && (splitRes[i].substring(3) != mode)) {             
             document.getElementById(splitRes[i]).disabled = true;           
         }
     }    
    var C ;
 // ================= this value "mode" assign to var c not assign in ie browser but works in chrome=====================  
 C = mode;
    
    if (C== 'View') {
         document.getElementById('btnConfirm').disabled = true;
     }

     SetEnableDisable(C);
 }
 function SetEnableDisable(getId) {
    alert('getId='+getId);
     var retval = true;
     if (getId == "Add") { 
         retval = OnAddClick();
     }
     else if (getId == "Modify") {
         retval = OnModifyClick();
     }
     else if (getId == "Delete") {
         retval = OnDeleteClick();
     }
     else if (getId == "View") {
         retval = OnViewClick();
     }
     else if (getId == "Approve") {
         retval = OnApproveClick();
     }
     else if (getId == "DeActivate") {
         retval = OnDeActivateClick();
     }
     else if (getId == "ReActivate") {
         retval = OnReActivateClick();
     }
     else if (getId == "Cancel") {
         retval = OnCancelClick();
     }
     else if (getId == "Execute") {
         retval = OnExecuteClick();
     }
     else if (getId == "Print") {
         retval = OnPrintClick();
     }
     else if (getId == "Review") {
         retval = OnReviewClick();
     }
     else if (getId == "Release") {
         retval = OnRelease();
     }
     if (retval == true) {
         return true;
     }
     else {
         return false;
     }
 }

this PageLoadfunctn call on master page load and setmode call in PageLoad as well as onclick event of btn.
Provide a soln to work this in all browser.if is there any error in the code inform me.thanx

provide soln