function checkform(of)
		{
			var reqfields,em,i,f,ty;
			if(document.getElementById('required'))
			{
				reqfields=document.getElementById('required').value.split(',');
				if(document.getElementById('errormsg')){
					em=document.getElementById('errormsg');
					em.parentNode.removeChild(em);
				}
				for(i=0;i<reqfields.length;i++)
				{
					f=document.getElementById(reqfields[i]);
					if(f.previousSibling && /img/i.test(f.previousSibling.nodeName)){
						f.parentNode.removeChild(f.previousSibling);
					}
					f.style.background='transparent';
					if(f){
						ty=f.type.toLowerCase();
						switch(ty)
						{
							case 'text':
								if(f.value==''){adderr(f.id,of)}							
							break;
							case 'textarea':
								if(f.value==''){adderr(f.id,of)}							
							break;
							case 'checkbox':
								if(!f.checked){adderr(f.id,of)}							
							break;
						}
					}
					
				}
				
			}
			if(document.getElementById('errormsg'))
			{
				return false;
			}
		}
		function adderr(id,of)
		{
			if(!document.getElementById('errormsg')){
				var em=document.createElement('p');
				em.id='errormsg';
				em.appendChild(document.createTextNode('Please complete all fields'));
				for(var i=0;i<of.getElementsByTagName('input').length;i++)
				{
					if(/submit/i.test(of.getElementsByTagName('input')[i].getAttribute('type')))
					{
						var sb=of.getElementsByTagName('input')[i];
						break;
					}
				}
				sb.parentNode.insertBefore(em,sb);
			}
			if(id=='email' && !isEmailAddr(document.getElementById(id).value)){
				pn=document.createElement('p');
				pn.id='emailerror';
				pn.appendChild(document.createTextNode('Your email seems to be invalid'))
				document.getElementById('errors').appendChild(pn);
			}
		}

		function isEmailAddr(str) 
		{
		    return str.match(/^[\w-]+(\.[\w-]+)*@([\w-]+\.)+[a-zA-Z]{2,7}$/);
		}