scroll bar is not showing

i am making a website, where the scroll bar is not showing in any browser.....in firefox i can use down key to move downwards in chrome it worst...i am showing my codes below and i used div tag for division of page.. any suggestion:

• globalheader-->at top of page;
• globalnav-->should be at left hand side with fixed position no effect of scrolling.
• globalcontent-->at the middle of page, here i show all data and results.
• globalright-->at the right hand side of page-

css code:

html { overflow: -moz-scrollbars-vertical; overflow-y: scroll; height: 101%;}
body{ padding:0px; margin:0px; }

#globalheader{width:930px; height:28px;background:#开发者_JAVA百科fff; z-index:1; position:absolute;
                margin: 15px 200px 0px 200px; padding: 1px; float:left;  border:0px solid;  }  


#globalnav { float:left; margin:120px 0px 0px 0px; padding:0px; background:#FFF; z-index:2;
            position:fixed; left:0px; overflow:visible;   width:150px; height:auto;           border:0px solid #ababab;}

#globalright{  margin-top:50px; height:auto; width:205px; position: absolute; left:1055px;   
              right:0px; top:50px; border:#cdcdcd 0px solid;    }


#globalcontent{ margin:50px 105px 20px 215px; border:#aaa 1px solid;  height:900px;

                    float:left; width:761px;  border-top:none;}

For #globalcontent's style use, min-height:900px;, instead of height:900px;
Also, 100%, not 101% for html's height.

More importantly, consider using a standard, tried-and-proven layout, like "The Perfect 3 Column Liquid Layout" (et cetera) instead of reinventing the wheel unnecessarily.