document.write('')

agt=navigator.userAgent.toLowerCase()

ie=(document.all) ? 1:0
ie4=(agt.indexOf('msie 4')!=-1) ? 1:0
ie5=(agt.indexOf('msie 5')!=-1) ? 1:0
ie55=(agt.indexOf("msie 5.5")!=-1) ? 1:0
ie6=(agt.indexOf("msie 6")!=-1) ? 1:0
ie = ie4 || ie5 || ie55 || ie6
ns=(document.layers && parseInt(navigator.appVersion)>=4) ? 1:0
best=(document.getElementById) ? 1:0
opera=(agt.indexOf("opera")!=-1) ? 1:0
gecko=(agt.indexOf("gecko")!=-1) ? 1:0

win=( (agt.indexOf("win")!=-1) || (agt.indexOf("16bit")!=-1) )
mac=(agt.indexOf("mac")!=-1);
imgs=(document.images) ? 1:0

//check form
function check_form(obj){
    for (i=0;i<obj.length;i++){
        if (obj[i].value == ''){alert('Все поля обязательны для заполнения!');return false}
    }
}

//menu
function preload(){
    pic_menu = new Array()
    for (i=1;i<5;i++){
        pic_menu[i] = new Image()
        pic_menu[i].src = 'images/menu_'+i+'_on.gif'
    }
    pic_pm_on = new Image()
    pic_pm_on.src = 'images/minus.gif'
    pic_pm_off = new Image()
    pic_pm_off.src = 'images/plus.gif'
}

function img_change(id){
    pic_tmp = new Image()
    eval('pic_tmp.src = pic_menu['+id+'].src')
    eval('pic_menu['+id+'].src = document.images.pic_menu_'+id+'.src')
    eval('document.images.pic_menu_'+id+'.src = pic_tmp.src')
}

function pm_change(id){
    if(eval('document.images.pic_pm_'+id+'.src').indexOf('plus') != -1){
        eval('document.images.pic_pm_'+id+'.src = pic_pm_on.src')
        pm_show('cat_'+id,'block')
    } else {
        eval('document.images.pic_pm_'+id+'.src = pic_pm_off.src')
        pm_show('cat_'+id,'none')
    }
}

function pm_show(thelayer,what){
    if(ie){eval(thelayer+'.style.display="'+what+'"')}
	if(gecko || best){eval('document.getElementById("'+thelayer+'").style.display="'+what+'"')}
    if(ns){eval('document.'+thelayer+'.display="'+what+'"')}
}

function show_prod(id){
    eval("window.open('prod_view.asp?id="+id+"', '', 'width=840,height=700,toolbar=2,scrollbars=1')")
}

function brw_size(what) {
if (ns || gecko) {
    width = innerWidth
    height = innerHeight
} else {
    width = document.body.clientWidth
    height = document.body.clientHeight
}
if (what == "w") return width
if (what == "h") return height
}