function checkForm(){
		
	if (document.form1.Username.value == '') {
		alert('Please enter your name ');
		document.form1.Username.focus();
		return false;
	}
	
	else 
		if (document.form1.Country.value == '') {
			alert('Please enter your Country ');
			document.form1.Country.focus();
			return false;
		}
/*
		
		else 
			if (document.form1.RentalCode.value == '') {
				alert('Please enter your Rental Code ');
				document.form1.RentalCode.focus();
				return false;
			}
			
*/
			else 
				if (document.form1.UserEmail.value == '') {
					alert('Please fill email ');
					document.form1.UserEmail.focus();
					return false;
				}
				else 
					if ((document.form1.UserEmail.value.indexOf(".") == -1) || (document.form1.UserEmail.value.indexOf("@") == -1)) {
						alert('Please correct your email');
						document.form1.UserEmail.focus();
						return false;
					}
					else 
						if (document.form1.UserTel.value == '') {
							alert('Please enter your UserTel ');
							document.form1.UserTel.focus();
							return false;
						}
						
						else 
							if (document.form1.Comments.value == '') {
								alert('Please enter your Comments ');
								document.form1.Comments.focus();
								return false;
							}
								return true;

} 


	function height(){
	
	var hleft= document.getElementById('div_left').offsetHeight;
	var hcenter= document.getElementById('div_center').offsetHeight;
	var hright= document.getElementById('div_right').offsetHeight;

	    var m=hleft;
		var pl=0;
		var pc=hleft-hcenter;
		var pr=hleft-hright;
		var devided_padding_left;
		var devided_padding_center;
		var devided_padding_right;
		
		if (hcenter>m) {
			m=hcenter;	
			var pl=hcenter-hleft;
			var pc=0;
			var pr=hcenter-hright;
		
		}
		if (hright>m) {
			m=hright;
			var pl=hright-hleft;
			var pc=hright-hcenter;
			var pr=0;
		}
		
		devided_padding_left = Math.ceil(pl/6)+"px";
		devided_padding_center = Math.ceil(pc/6)+"px";
		devided_padding_right= Math.ceil(pr/6)+"px";
		
		document.getElementById('div_left_1').style.paddingTop=devided_padding_left;
		document.getElementById('div_left_1').style.paddingBottom=devided_padding_left;
		document.getElementById('div_left_2').style.paddingTop=devided_padding_left;
		document.getElementById('div_left_2').style.paddingBottom=devided_padding_left;
		document.getElementById('div_left_3').style.paddingTop=devided_padding_left;
		document.getElementById('div_left_3').style.paddingBottom=devided_padding_left;
		
		document.getElementById('div_center_1').style.paddingTop=devided_padding_center;
		document.getElementById('div_center_1').style.paddingBottom=devided_padding_center;
		document.getElementById('div_center_2').style.paddingTop=devided_padding_center;
		document.getElementById('div_center_2').style.paddingBottom=devided_padding_center;
		document.getElementById('div_center_3').style.paddingTop=devided_padding_center;
		document.getElementById('div_center_3').style.paddingBottom=devided_padding_center;
		
		document.getElementById('div_right_1').style.paddingTop=devided_padding_right;
		document.getElementById('div_right_1').style.paddingBottom=devided_padding_right;
		document.getElementById('div_right_2').style.paddingTop=devided_padding_right;
		document.getElementById('div_right_2').style.paddingBottom=devided_padding_right;
		document.getElementById('div_right_3').style.paddingTop=devided_padding_right;
		document.getElementById('div_right_3').style.paddingBottom=devided_padding_right;
		
		
	}