用CSS画一个三角形
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"><html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <style type="text/css"> .tipArrow { /*右边有颜色，其他透明*/ border-color: transparent #e00 transparent transparent; border-style: solid; border-width: 6px 6px 6px 0px; padding: 0; width: 0; height: 0; /* ie6 height fix */ font-size: 0; line-height: 0; /* ie6 transparent fix */ _border-top-color: #dddddd; _border-bottom-color: #dddddd; _filter: chroma( color = #dddddd); } </style> </head> <body> <div class="tipArrow"/> </body></html>?