function validate_required(field,alerttxt) {
	with (field) {
		if (value==null||value=="") {
			alert(alerttxt);
			return false;
		} else {
			return true
		}
	}
}

function validate_add_basket(thisform) {
	with (thisform) {
		if (validate_required(size,"Please select a size first!")==false) {
			email.focus();
			return false;
		}
		if (validate_required(handing,"Please select either Left or Right Handed!")==false) {
			email.focus();
			return false;
		}
	}
}

function popup(url) {
	var newwindow;
	newwindow=window.open(url,'name','height=600,width=600,scrollbars=1');
	if (window.focus) {newwindow.focus()}
}

function toggleLayer( whichLayer ) {  
	var elem, vis;  
	if( document.getElementById ) 
		elem = document.getElementById( whichLayer );  else if( document.all )
		elem = document.all[whichLayer]; 
	else if( document.layers ) 
		elem = document.layers[whichLayer];  
		vis = elem.style; 
	if(vis.display==''&&elem.offsetWidth!=undefined&&elem.offsetHeight!=undefined)
		vis.display = (elem.offsetWidth!=0&&elem.offsetHeight!=0)?'block':'none';
		vis.display = (vis.display==''||vis.display=='block')?'none':'block';
}

function confirmSubmit() {
	var agree=confirm("Your current basket will be lost!\n\nAre you sure?");
	if (agree)
		return true ;
	else
		return false ;
}

function valButton(btn) {
    var cnt = -1;
    for (var i=btn.length-1; i > -1; i--) {
        if (btn[i].checked) {cnt = i; i = -1;}
    }
    if (cnt > -1) return btn[cnt].value;
    else return null;
}