/**
 * 帮助页面展开和收起（显示和隐藏）帮助项的脚本
*/

//展开（显示）所有项
function openAll(documentName) {
	//alert('openAll()');
	//var help_tr;
	for(var i=1;; i++) {
	  var help_tr = documentName.getElementById('help_tr'+i);
	  if(help_tr==null||help_tr==undefined)break;
      openOne(help_tr);
	}
}

//收起（隐藏）所有项，参数为对象
function closeAll(documentName) {
	//alert('closeAll()');
	try {
	//var help_tr;
	for(var i=1;; i++) {
	  var help_tr = documentName.getElementById('help_tr'+i);
	  if(help_tr==null||help_tr==undefined)break;
      closeOne(help_tr);
	}
   }catch(e){
   }
}

//展开（显示）特定项，参数为对象
function openOne(trName) {
	trName.style.display="";
}

//收起（隐藏）特定项，参数为对象
function closeOne(trName) {
	 trName.style.display="none"; 
}

//变换特定项，参数为对象
function changeOne(trName) {
	try {
	  old = trName.style.display;
	  if (old=="none") {	   
	    openOne(trName);
	  } else {
	    closeOne(trName); 
	  }
   }catch(e){
   }
}

//变换特定项，参数为字符串
function change(trNameStr) {
	try {
	  trName = window.document.getElementById(trNameStr)
	  old = trName.style.display;
	  if (old=="none") {	   
	    openOne(trName);
	  } else {
	    closeOne(trName); 
	  }
   }catch(e){
   }
}

//示范:
//openAll(window.document)
//closeAll(window.document)
//change('help_tr1')
//
//<tr id="help_tr1" style="DISPLAY:NONE ;border-right: 1 solid #000000" >


//<tr id="help_tr" style="DISPLAY:NONE ;border-right: 1 solid #000000" >
//javascript:change('help_tr')