下面按条件搜索的代码是什么意思,

下面按条件搜索的代码是什么意思,var SearchID =5;var SearchURL = new Array();SearchURL[4] = '/truck/';SearchURL[5] = '/sell/';SearchURL[6] = '/buy/';SearchURL[7] = '/news/';SearchURL[21] = '/company/';function setdsearch(ID) {\x05if(ID == SearchID) return;\x05document.getElementById('ms'+ID).className = 'sch_on';\x05document.getElementById('ms'+SearchID).className = 'sch_li';\x05SearchID = ID;\x05}function keypress(){var e=e||event; var keyName="start";var currKey=e.keyCode||e.which||e.charCode;if(currKey==13){Dsearch();return false;}} function Dsearch() {\x05if(document.getElementById('destoon_kw').value == '' || document.getElementById('destoon_kw').value == '请输入您要找信息的关键字') {\x05\x05alert('请输入关键字');\x05\x05document.getElementById('destoon_kw').focus();\x05\x05return false;\x05}\x05else\x05{\x05 var key=document.getElementById('destoon_kw').value;\x05 //window.location=SearchURL[SearchID]+'Search.aspx?key='+escape(key);\x05 if(SearchID==5){\x05 window.open(SearchURL[SearchID]+'sells.aspx?key='+escape(key));\x05 }else if(SearchID==6){\x05 window.open(SearchURL[SearchID]+'buy.aspx?key='+escape(key));\x05 }else if(SearchID==4){\x05 window.open(SearchURL[SearchID]+'truck.aspx?key='+escape(key));\x05 }else{\x05 window.open(SearchURL[SearchID]+'Search.aspx?key='+escape(key));\x05 }\x05}}没有人回答啊