//Contact Us
function check_form(chk)
{
		var first_name 	= trim(chk.first_name.value);
		var last_name  	= trim(chk.last_name.value);
		
		var company 	= trim(chk.company.value);
		var phone 		= trim(chk.phone.value);
		var email		= trim(chk.email.value);
		var description	= trim(chk.description.value);

		if(first_name == "")
		 {
			alert("Please enter your first name.");
			chk.first_name.focus();
			return false;
		}
		if(isNotAlphabets(first_name))
		 {
			alert("Invalid characters in first name.");
			chk.first_name.focus();
			return false;		  
		 }
		 
		if(last_name == "")
		 {
			alert("Please enter your last name.");
			chk.last_name.focus();
			return false;
		}
		if(isNotAlphabets(last_name))
		 {
			alert("Invalid characters in last name.");
			chk.last_name.focus();
			return false;		  
		 }
		 
		if(company == "")
		{
			alert("Please enter your company name.");
			chk.company.focus();
			return false;
		}

		 if(email == "")
		 {
			alert("Please enter your email address.");
			chk.email.focus();
			return false;
		 }
		 				
		 if(!checkEmail(email))
		 {
			alert("Please enter valid email address.");
			chk.email.focus();
			return false;		  
		 }

		 if(phone == "")
		 {
			alert("Please enter your phone.");
			chk.phone.focus();
			return false;
		 }
		 				
		 if(isNotNumeric(phone))
		 {
			alert("Invalid characters in phone.");
			chk.phone.focus();
			return false;		  
		 }
		 
		 if(description == "")
		 {
			alert("Please let us know what you are looking for?");
			chk.description.focus();
			return false;
		 }

}