<style>

.box1{

width:100px;

height:50px;

float:left;

background:#dedede;

_margin-right:-3px;

}

.box2{

margin-left:100px;

_margin-left:0px;

_zoom:1;

background:red;

}

</style>

 

<div class="box1"></div>

<div class="box2">kkkkkkkkkbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb</div>