function PrintPreview() {
	var this_page = document.location.href
	var query_string = "";
	if(this_page.indexOf("?") > -1) {
		query_string = this_page.substring(this_page.indexOf("?"),this_page.length);
	}

	var formelem = document.getElementById("form1") ;
	if (formelem)
	    document.forms["form1"].submit() ;
	else {
	   var print_url = "print_preview.html" + query_string;
	   var print_window=window.open(print_url,'PrintWindow','width=700,height=550,status=no,scrollbars=yes,location=no,menubar=yes,resizable=yes');
	}
	
}