/*var checkflag = "false";
function selectall(field) {
	if (checkflag == "false") {
		for(var i=0;i<field.length;i++){
 			field[i].checked = true;
		}
		checkflag = "true";
	}
	else
	{
		for(var i=0;i<field.length;i++){
 			field[i].checked = false;
		}
		checkflag = "false";
	}
}*/
var checkflag = "false";
function selectall(){
	var field = document.form1.elements;
	if (checkflag == "false"){
		for(var i=0;i<field.length;i++){
			if(field[i].type == "checkbox"){
				field[i].checked = true;
			}
		}
		checkflag = "true";
	}
	else{
		for(i=0;i<field.length;i++){
			if(field[i].type == "checkbox"){
				field[i].checked = false;
			}
		}
		checkflag = "false";
	}
}
function del_check(){
var t=0;
for (i=0;i<document.form1.elements.length;i++)
	if (document.form1.elements[i].checked && document.form1.elements[i].value!='checkall') 
		t=1;
if (t!=1) 
	alert('Aucun element selectionne!');
else if(confirm('Etes-vous sur de vouloir effacer la selection ?'))
	document.form1.submit();
}