function toggleCheck(mode,type) 
    {
		var cka = document.getElementById('chkALL');
		var ckwD = document.getElementById('chkWD'); 
		var ckW = document.getElementById('chkWeekend');
       
        
	for(i=0; i<document.form1.elements.length; i++)
	{
		if(document.form1.elements[i].type=="checkbox")
		{
			if(type=="a")
			{
			
					if (cka.checked == true)
					{
						ckwD.checked = false;	
						ckW.checked = false;
					}
					
				if( (document.form1.elements[i].id=="ckList_0") || (document.form1.elements[i].id=="ckList_1") || (document.form1.elements[i].id=="ckList_2") || (document.form1.elements[i].id=="ckList_3") || (document.form1.elements[i].id=="ckList_4") || (document.form1.elements[i].id=="ckList_5") || (document.form1.elements[i].id=="ckList_6"))
				{
					document.form1.elements[i].checked=mode;
				}
				
			}
			
			else if(type=="wd")
			{
					if (ckwD.checked == true)
					{
						cka.checked = false;	
						ckW.checked = false;
					}
					
				if( (document.form1.elements[i].id=="ckList_0") || (document.form1.elements[i].id=="ckList_1") || (document.form1.elements[i].id=="ckList_2") || (document.form1.elements[i].id=="ckList_3") || (document.form1.elements[i].id=="ckList_5") || (document.form1.elements[i].id=="ckList_6"))
				{
					document.form1.elements[i].checked=mode;
				}
				
				if(document.form1.elements[i].id=="ckList_4")
				{
					document.form1.elements[i].checked=false;
				}
				
			}
			
			else if(type=="w")
			{
			
					if (ckW.checked == true)
					{
						cka.checked = false;	
						ckwD.checked = false;
					}

				if(document.form1.elements[i].id=="ckList_4")
				{
					document.form1.elements[i].checked=mode;
				}
				
				if( (document.form1.elements[i].id=="ckList_0") || (document.form1.elements[i].id=="ckList_1") || (document.form1.elements[i].id=="ckList_2") || (document.form1.elements[i].id=="ckList_3") || (document.form1.elements[i].id=="ckList_5") || (document.form1.elements[i].id=="ckList_6"))
				{
					document.form1.elements[i].checked=false;

				}
			}	
		}
	}
 
}