function Left(str, n){
	if (n <= 0)
	    return "";
	else if (n > String(str).length)
	    return str;
	else
	    return String(str).substring(0,n);
}
function Right(str, n){
    if (n <= 0)
       return "";
    else if (n > String(str).length)
       return str;
    else {
       var iLen = String(str).length;
       return String(str).substring(iLen, iLen - n);
    }
}




function tickall(sname,thiscontrol)
{

for(i=0; i<thiscontrol.form.elements.length; i++)
{

var l=String(sname).length;
var e=String(thiscontrol.form.elements[i].name).length;

//document.frmSel.elements[i].name

if (l<e) {
    if(Left(thiscontrol.form.elements[i].name,l)==sname) {
    if (thiscontrol.form.elements[i].checked!=thiscontrol.checked) {thiscontrol.form.elements[i].click()}
    }
    
}

}
}