function SetCol(Element, Col) {
        if (Element.style)
          Element.style.backgroundColor = Col;
      }
     
      function CheckForm(Form){    
        var ColErr = "#d5d5d5";    
        var ColOK = "";   
        var Valid = true;
        if (Form.name.value == ""){    
          Valid = false;
      
          SetCol(Form.name, ColErr);
        } else {
          SetCol(Form.name, ColOK);
        }
       
		if (Form.tel.value == ""){
          Valid = false;
          SetCol(Form.tel, ColErr);
        } else {
          SetCol(Form.tel, ColOK);
        }		

        if ((Form.email.value == "") ||
            (Form.email.value.indexOf('@') == -1)){
          Valid = false;
          SetCol(Form.email, ColErr);
        } else {
          SetCol(Form.email, ColOK);
        }  
        if (!Valid)
          alert("One or more problems exist with the data you have entered.!");   
        return Valid;
      }