var W3CDOM = (document.getElementsByTagName && document.createElement);
		
		window.onload = function () {
			document.forms[0].onsubmit = function () {
				return validate();
			}
		}
		
		function validate() {
			validForm = true;
			firstError = null;
			errorstring = '';
			var x = document.forms[0].elements;
			for (var i=0;i<x.length;i++) {
				if (!x[i].value || x[i].value == x[i].defaultValue) {	
					if(x[i].type=="submit" || x[i].type=="hidden")
						continue;
					writeError(x[i],'Required Field');				
				}
					
			}
			if (x['email'].value.indexOf('@') == -1)
				writeError(x['email'],'Please enter a valid e-mail address.');
			if (!W3CDOM)
				alert(errorstring);
			if (firstError)
				firstError.focus();
			if (validForm)
				//alert('All data is valid!');
				return true;
			return false;
		}
		
		function writeError(obj,message) {
			validForm = false;
			if (obj.hasError) return;
			if (W3CDOM) {
				obj.className += ' error';
				obj.onchange = removeError;
				var sp = document.createElement('p');
				sp.className = 'error';
				sp.appendChild(document.createTextNode(message));
				obj.parentNode.appendChild(sp);
				obj.hasError = sp;
			}
			else {
				errorstring += obj.name + ': ' + message + '\n';
				obj.hasError = true;
			}
			if (!firstError)
				firstError = obj;
		}
		
		function removeError()
		{
			this.className = this.className.substring(0,this.className.lastIndexOf(' '));
			this.parentNode.removeChild(this.hasError);
			this.hasError = null;
			this.onchange = null;
		}