function checkFieldValue(obj) {
	if (obj.value.substr(0,1) == '<') obj.value='';
}

function pop(obj, width, height, scrolling)
{ 
	var x=(screen.width-width)/2; 
	var y=(screen.height-height)/2;
	if (scrolling) {
		scrollbars = "yes";
	} else {
		scrollbars = "no";
	}
	popUpWindow = window.open(obj.href, "", "width="+width+",height="+height+",resizable=no,scrollbars="+scrollbars+",screenX="+x+",screenY="+y+",left="+x+",top="+y);
	popUpWindow.focus();
	return false;
};