function checkfornumeric (fieldname, formname)
{
	var fieldcode="document."+formname+".elements['"+fieldname+"']";
	thenumber=eval(fieldcode+".value");
	//alert(thenumber);
	//alert(thenumber.indexOf("."));
	if (thenumber.search(/[^0-9.]/) != -1)
	{
  	alert("Please enter numbers only.");
    eval(fieldcode+".value=''");
		document.formname.fieldname.focus();
	}
}
function popup_params(page,width,height) {
 options = "toolbar=0,status=0,menubar=0,scrollbars=1,resizable=1,width="+width+",height="+height
 window.open(page, "Popup", options)
}