//过滤URL非法SQL字符 
var sUrl=location.search.toLowerCase(); 
var sQuery=sUrl.substring(sUrl.indexOf("=")+1); 
re=/select|update|delete|truncate|join|union|exec|insert|drop|count|'|"|;|>|<|%/i; 
if(re.test(sQuery)) 
{ 
  alert("请勿输入非法字符"); 
  location.href=sUrl.replace(sQuery,""); 
} 

/防止SQL注入 
 2function AntiSqlValid(oField ) 
 3{ 
 4  re= /select|update|delete|exec|count|'|"|=|;|>|<|%/i; 
 5  if ( re.test(oField.value) ) 
 6  { 
 7  //alert("请您不要在参数中输入特殊字符和SQL关键字！"); //注意中文乱码 
 8  oField.value = "; 
 9  oField.className="errInfo"; 
10  oField.focus(); 
11  return false; 
12  }