document.write("<img src='../Images/tree_folder3.gif' width='15' height='15' valign='abvmiddle'><a href='/Supply/ShowClass.asp?ClassID=18' title='' target='_top'><b>省内线路</b></a><br><img src='../Images/tree_folder3.gif' width='15' height='15' valign='abvmiddle'><a href='/Supply/ShowClass.asp?ClassID=19' title='' target='_top'><b>国内线路</b></a><br><img src='../Images/tree_folder3.gif' width='15' height='15' valign='abvmiddle'><a href='/Supply/ShowClass.asp?ClassID=21' title='' target='_top'><b>国际线路</b></a><br><img src='../Images/tree_folder3.gif' width='15' height='15' valign='abvmiddle'><a href='/Supply/ShowClass.asp?ClassID=20' title='' target='_top'><b>港澳台专线</b></a><br>");