var run=1;  
function send_check() {
  var ok=1;
  var rc='1px solid #ff0000',orc='1px dashed #a4a4a4';
  var rb='#FFCCCC',orb='#FFFFFF';
  if(undefined===document.forms['chat_msg_form']) {clearInterval(interval); return;} 
  if(run) {   
    var frm=document.forms['chat_msg_form'];
     
    var msg=frm.elements['msg'];
    var msgRE=/[\>\<]/;
      if (!msg.value) ok = 0; 
      if(msgRE.test(msg.value)){msg.style.backgroundColor=rb;ok=0;}else {msg.style.backgroundColor=orb;} 
                 
    if(ok==1) frm.sbut.disabled=false;else frm.sbut.disabled=true;
  }
  
  if(null !== document.getElementById('ss_gift_amount')) {
    ok=1;
    var g_amount=document.getElementById('ss_gift_amount');
    var g_amountRE=/[^0-9]/;
    if(g_amountRE.test(g_amount.value)){g_amount.style.backgroundColor=rb;ok=0;}else {g_amount.style.backgroundColor=orb;} 
    if(g_amount.value == "") ok=0; 
        
    var ss_gift_model=document.getElementById('ss_gift_model');
    if(ss_gift_model.value == -1) ok=0;



    var g_btn=document.getElementById('ss_gift_btn');
    if(ok==1) g_btn.disabled=false;else g_btn.disabled=true; 
  }
}