dans la partie head

<SCRIPT language="javascript"> function multi_f(){ var varp ='"toolbar=0,location=0,status=0,menubar=0,scrollbars=0,width=60,height=120px,'; f1 = open("page1.htm", 'f1', varp + "left=0, top=0"); f2 = open("page2.htm", 'f2', varp + "left=100, top=100"); f3 = open("page3.htm", 'f3', varp + "left=250, top=150"); f4 = open("page4.htm", 'f4', varp + "left=450, top=200"); f5 = open("page5.htm", 'f5', varp + "left=650, top=250");} </SCRIPT>

dans la partie body

<form> <input type="button" value="Clic!" OnClick="multi_f()"> </form>