function check()
{
var accesscount=800  
var len=document.form1.text_com.value.length
if (len > accesscount)
{document.form1.text_com.value=document.form1.text_com.value.substring(0,accesscount)
document.form1.text_com.style.background='#FF9F9F'}
else{
document.getElementById('SymbolCount').innerHTML=accesscount-len
document.form1.text_com.style.background='#fff'}
}