function checkform () {
	
	var ausdruck=/^[\w-\.]+@[\w-\.]+\.[a-zA-Z]{2,4}$/;
          var Email=document.form.email.value;
          if (!ausdruck.test(Email))
          {
          alert ("Please enter a valid e-mail!");
          document.form.email.focus();
          return false;
          }
		  
		  
        if (document.form.name.value == "")
        {
    alert("Please enter you name!");
    document.form.name.focus();
    return false;
          }
		  
		  if (document.form.company.value == "")
          	{
    		alert("Please enter a company name!");
    		document.form.company.focus();
    		return false;
          	}
			

        if (document.form.prefix.value == "")
        {
    alert("Please enter a valid prefix!");
    document.form.prefix.focus();
    return false;
          }

        if (document.form.phone.value == "")
        {
    alert("Please enter a valid phone number!");
    document.form.phone.focus();
    return false;
          }

          
}