function isValidEmail(str) {
		return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
	}
	
	function validate()
    { 
		if (document.contactus.name.value==null || document.contactus.name.value==""){
			alert("Please enter First Name");
			return false;
		}
		if (document.contactus.email.value==null || document.contactus.email.value==""){
			alert("Please enter Email");
			return false;
		}
		if (document.contactus.email.value!=null || document.contactus.email.value!=""){
			if(!isValidEmail(document.contactus.email.value)){
				alert("Please enter correct Email eg. xyz@gmail.com");
				return false;
			}			
		}
		
		if (document.contactus.phone.value==null || document.contactus.phone.value==""){
			alert("Please enter Phone number");
			return false;
		}
		if (document.contactus.subject.value==null || document.contactus.subject.value==""){
			alert("Please enter Subject");
			return false;
		}
		if (document.contactus.companyname.value==null || document.contactus.companyname.value==""){
			alert("Please enter Company Name");
			return false;
		}
		if (document.contactus.message.value==null || document.contactus.message.value==""){
			alert("Please enter Message");
			return false;
		}
	}