/*
	Standards Compliant Rollover Script
	Author : Daniel Nolan
	http://www.bleedingego.co.uk/webdev.php
*/

function initRollovers() {
	if (!document.getElementById) return
	
	var aPreLoad = new Array();
	var sTempSrc;
	var aImages = document.getElementsByTagName('input');

	for (var i = 0; i < aImages.length; i++) {		
		if (aImages[i].className == 'imgover') {
			var src = aImages[i].getAttribute('src');
			var ftype = src.substring(src.lastIndexOf('.'), src.length);
			var hsrc = src.replace(ftype, '_o'+ftype);

			aImages[i].setAttribute('hsrc', hsrc);
			
			aPreLoad[i] = new Image();
			aPreLoad[i].src = hsrc;
			
			aImages[i].onmouseover = function() {
				sTempSrc = this.getAttribute('src');
				this.setAttribute('src', this.getAttribute('hsrc'));
			}	
			
			aImages[i].onmouseout = function() {
				if (!sTempSrc) sTempSrc = this.getAttribute('src').replace('_o'+ftype, ftype);
				this.setAttribute('src', sTempSrc);
			}
		}
	}
}

window.onload = initRollovers;


function validate(evt) 
{
	var m = new Array(4);
	
	m[0]=mainform.last_name.value;
	m[1]=mainform.Company.value;
	m[2]=mainform.email.value;
	m[3]=mainform.Telephone_Number.value;

	num = 0;
	str = '';
	if(m[0] == '' || m[1] == '' || (m[2] == ''  && m[3] == ''))
	{
		str = 'The following fields are missing: ';

		if(m[0] == '') str += 'Last Name \n\t\t\t  ';
		if(m[1] == '') str += 'Company \n\t\t\t  ';
		if(m[2] == ''  && m[3] == '') str+= 'Telephone and/or Email \n\t\t\t  ';		
	}

	str2 = '';
	if(m[1] == '') str2 = '\nIf you are an independent buyer, type in your last name for the Company field.';
	str = str + str2;
	
	if(str != '') 
	{		
		alert(str); 

		 evt = (evt) ? evt : ((event) ? event : null);
		    if (evt) {
		            if (evt.returnValue) {
		                evt.returnValue = false;
		            } else if (evt.preventDefault) {
		                evt.preventDefault();
		            } else {
		                return false;
		            }
		        }


		event.returnValue=false; //for IE			
	}
}