理解标签重置reset

/*样式表文件来自 懒人css http://lrcss.lrjz100.com */
/*---------重置---------*/
html{font-size: 100%;-webkit-text-size-adjust:100%; -ms-text-size-adjust:100%;    *overflow:auto;_overflow-x:hidden;}
body{margin:0;}
p,ul,ol,form,dl,h1,h2,h3,h4,h5,h6{ margin-top:0; margin-bottom:0;}
dl,dd{ margin-left:0;}
ul,ol{padding-left:0;*margin-left:0;list-style-type: none;}
ul li{*zoom:1;*vertical-align:bottom;}
em,var,cite,i{font-style:normal;}
small{font-size:inherit;}
s,a{text-decoration:none;}
:focus{outline:none;}
blockquote,q{quotes:none; margin:0;}
table{border-collapse:collapse;border-spacing:0;empty-cells:show;/*table-layout:fixed;*/}
img,iframe{border:none;}
img{vertical-align: top;-ms-interpolation-mode: bicubic;/*ie7防止图片缩小失真的*/}