infosearch.js

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//--检测搜索的安全性-->

function doSearch() {

  var keywords = trim(document.search_form.keywords.value);
 // var direction = document.searchForm.direction.value;

  if(keywords == "" || keywords == "输入关键字" ) {
	alert("请输入关键字！");
	document.search_form.keywords.focus();
	return false;
  }
 }

function trim(inputString) {

  if (typeof inputString != "string") { return inputString; }
  var retValue = inputString;
  var ch = retValue.substring(0, 1);
  while (ch == " ") { 
  //检查字符串开始部分的空格
	  retValue = retValue.substring(1, retValue.length);
	  ch = retValue.substring(0, 1);
  }
  ch = retValue.substring(retValue.length-1, retValue.length);
  while (ch == " ") {
	 //检查字符串结束部分的空格
	 retValue = retValue.substring(0, retValue.length-1);
	 ch = retValue.substring(retValue.length-1, retValue.length);
  }
  while (retValue.indexOf("  ") != -1) { 
 //将文字中间多个相连的空格变为一个空格
	 retValue = retValue.substring(0, retValue.indexOf("  ")) + retValue.substring(retValue.indexOf("  ")+1, retValue.length); 
  }
  return retValue;
} 
//-->