A window ezivelelayo-kwi [isuswe]. izimvo zakhe, injongo

Yinto eyaziwayo ukuba amaphepha kweendawo Internet wadala kwi ulwimi lophawulo ne apho umkhangeli anxibelelana ulwazi olusisiseko malunga izinto usemthethweni iphepha enjalo yendawo kuthelekiswa wabo kwibrawuza window, kunye nabanye, ubungakanani ngokomyalelo. Kuba "ukuvuselela" kwesiza uze ube nembono enemibala usebenzisa isimbo sheets ayingxangxasi zikhutshwe, njengoko umthetho, ngaphandle umzimba omkhulu kwiphepha - html-code. Ukusetyenziswa html kunye CSS likuvumela ukuba uqonde ukuhlakanipha kunazo ngumyili ideas web. Noko ke, iphepha ezinjalo, enoba enemibala na, ayisebenzi, oko kukuthi, akakwazi ukunxibelelana kumsebenzisi behleli phambi kwe esweni computer.

Nayiphi indawo mihla wadala ngokusebenzisa iilwimi ezininzi kweenkqubo, indawo yakhe phakathi kwabo bobabo JavaScript.

JavaScript (JS) - ulwimi lokuprograma esisetyenziswayo ukwenza amaphepha e web interactive. Ngoko nangoko ke kufuneka wakhumbula ukuba JavaScript kunye Java - ulwimi ezibini ezahlukeneyo ukuba enze imisebenzi eyahlukeneyo. JS isisekelo up zeempendulo - iinkqubo ezincinane eziqulathe isethi imiyalelo ethile ekufuneka yenziwe kwisiza nangaliphi na ixesha. Ezi program zingafakwa ngqo kwi umzimba main page html-uxwebhu okanye zingeniswe phantsi ngaphaya kwayo kwifayile esecaleni nodibaniso kuyo c usebenzisa phawu okhethekileyo, ebonisa indawo le fayile. JS kalula 'ukuvuselela "iphepha le sayithi, ukudala pop-up wamkelekile screen, ikhalenda yangoku okanye iwotshi, uhlobo lokubhala itekisi ukuthumela, njl

Siza kuthetha okungakumbi ipop up-iintengiso, abhalwe JavaScript izeziphi uxande badla amancinci kuvela ngokuzenzekelayo phezu engundoqo umkhangeli window xa umsebenzisi angenzi nasiphi ukuphululwa (umzekelo, xa uhambisa ngaphezulu kwegama ethile, umfanekiso). Kwezinye iimeko, i window ezivelelayo-ivela kwikhusi ngoko nangoko emva kokuba iphepha lokuqala wesiza. I-JS kusetyenziswa iintlobo ezintathu kula window:

- I isignali lisetyenziswa kwiimeko apho zonke iinkcukacha kufuneka siqhubeke zidluliselwa umtyeleli site. Isenzo esiqhubekayo kwi kwisiza kwityala enjalo kunokwenzeka kuphela emva kokuba ucofe iqhosha, "Kulungile", umsebenzisi ngokwakhe.

- A isikhawulezisi ezivelelayo-kusetyenziswa xa ufuna ukuqinisekisa ukuba umsebenzisi phambi kokuba ungene kwiphepha, laqalisa iinkcukacha ezithile.

- A window isiqinisekiso singasebenza umsebenzisi ekuvunyelwene ngayo nantoni na. Kulo mzekelo, uya kufuneka nqakraza ixabiso "OK" okanye "Rhoxisa".

Bhala umbhalo-ngqangi ezivelelayo-window nje ngokwaneleyo. Ukuze wenze oku, kufuneka ube nolwazi olusisiseko JavaScript. Ukuze ukukhangela umsebenzi obhaliweyo okanye hayi, kufuneka usebenzise njengawuphi na umkhangeli zincwadi Internet. Umzekelo, ukuba isikripthi: tufwile ( «Hello") ziya kuboniswa kwi isikhangeli Internet Explorer kwi window ethi "Molo" ngaphezulu kwe window yayo engundoqo. Xa JS kukunceda uyakwazi ukutshintsha ipop up-window (ububanzi bayo, ukuphakama, indawo), qiniseka ukuba ayenzi kubonakala kwangoko emva kokuba iindwendwe baya kwiphepha, yaye emva kokuba wenza ezithile nokwenza izinto.

Ekuphuhliseni iisayithi kufuneka athathe ingqalelo eninzi kujonge izinto. Kuyaqondakala ukuba imithombo online, Kakade ke, etsala ingqalelo iindwendwe zayo kwaye unika kwabo kuye. Kodwa akufuneki Fumana bathimba iincwadi zokubhala, ingakumbi, i-pop-ups. Abasebenzisi abaninzi ithambekele ukubacaphukisa. kubakhangeli zincwadi abasetyenziswayo ukubonelela uvimba izinto ezinjalo amaphepha kwi sayithi yakho, elikuvumela ukuba ukususa i pop-ups ngokucima ukhetho olufanelekileyo kwiimenu zabo. Ukuba kukho imfuneko, kufuneka uphinde ufake menu nokubuyisela ukukwazi ukubonisa ulwazi eempendulo yomkhangeli zincwadi.